Carmen Brown of Arlington was waiting in line while Esparza was being secured into the ride.

"They didn't secure her right," she told the Dallas Morning News. "One of the employees from the park -- one of the ladies -- she asked her to click her more than once, and they were like, 'As long you heard it click, you're OK,'" she said.

"Everybody else is like, 'Click, click, click.' Hers only clicked once. Hers was the only one that went down once, and she didn't feel safe, but they let her still get on the ride," Brown told the newspaper.

"Our thoughts and prayers are with the family. The investigation into the death at Texas Giant is still ongoing. We are working closely with authorities to determine the cause of the accident. The ride will remain closed. In addition, we have canceled the concert that was scheduled for today."